<ul class="nav navbar-nav">
    {% for parent in helper.getMenu(0) %}
        <li class="dropdown category-dropdown">
            <a href="#" class="dropdown-toggle" data-toggle="dropdown">{{parent.getName()}}</a>
            {% if helper.getMenu(parent.getId()) %}
                <ul class="dropdown-menu dropdown-menu-custom" role="menu">
                    {% for child in helper.getMenu(parent.getId()) %}
                        <li>{{ link_to("video/category?id=" ~ child.getId() , child.getName()) }}</li>
                    {% endfor %}
                </ul>
            {% endif %}
        </li>
    {% endfor %}
</ul>